Epiphytic Occurrence of Azorhizobium caulinodans and Other Rhizobia on Host and Nonhost Legumes

Author:

Adebayo A.1,Watanabe I.1,Ladha J. K.1

Affiliation:

1. The International Rice Research Institute, P.O. Box 933, Manila, Philippines

Abstract

A large population of Azorhizobium caulinodans was present on Sesbania rostrata ; up to 5 × 10 −5 cm −2 were found on leaves and fewer were found on flowers. Although A. caulinodans was also present on the leaves of Sesbania aculeata (nonhost), the populations were much smaller than that observed on S. rostrata . The population of S. aculeata rhizobia on host leaves was less than 30 cm −2 , and their presence on host flowers was sporadic. Aeschynomene afraspera and Aeschynomene aspera rhizobia, which are profusely stem nodulating, were found on the leaves of host and nonhost plants and on the flowers of host plants, but, Aeschynomene pratensis and Aeschynomene sensitiva rhizobia were not found on the leaves and flowers of host plants.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference12 articles.

1. Bohlool B. B. R. Kosslak and R. Woolfenden. 1984. The ecology of Rhizobium in the rhizosphere: survival growth and competition p. 287-293. In C. Veeger and W. E. Newton (ed.) Advances in nitrogen fixation research. Martinus Nijhoff/W. Junk Publishers The Hague The Netherlands.

2. Dreyfus B. L. and Y. R. Dommergues. 1981. Stem nodules of the tropical legume Sesbania rostrata p. 471. In A. H. Gibson and W. E. Newton (ed.) Current perspectives in nitrogen fixation. Australian Academy of Science Canberra.

3. Free-living Rhizobium strain able to grow on N2 as the sole nitrogen source;Dreyfus B. L.;Appl. Environ. Microbiol.,1983

4. Characterization of Azorhizobium caulinodans gen. nov., sp. nov., a stemnodulating nitrogen-fixing bacterium isolated from Sesbania rostrata;Dreyfus B.;Int. J. Syst. Bacteriol.,1988

5. Nitrogen fixation in leguminous plants. I. General characters of root-nodule bacteria isolated from species of Medicago and Trifolium in Australia;Jensen H. L.;Proc. Linn Soc. N. S. W.,1942

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